<template>
  <div id="app" class="app-container">
    <mt-header fixed title="lcj的一个Vue项目">
      <span  slot="left">
      <mt-button icon="back" @click="GoBack" v-show="flag">返回</mt-button>
      </span>
    </mt-header>

    <transition>
      <router-view></router-view>
    </transition>

    <nav class="mui-bar mui-bar-tab">
			<router-link class="my-tab-item" to="/home">
				<span class="mui-icon mui-icon-home"></span>
				<span class="mui-tab-label">首页</span>
			</router-link>
			<router-link class="my-tab-item" to="/member">
				<span class="mui-icon mui-icon-contact"></span>
				<span class="mui-tab-label">会员</span>
			</router-link>
			<router-link class="my-tab-item" to="/shopcar">
				<span class="mui-icon mui-icon-extra mui-icon-extra-cart"><span id="badge" class="mui-badge">{{totalcount}}</span></span>
				<span class="mui-tab-label">购物车</span>
			</router-link>
			<router-link class="my-tab-item" to="/search">
				<span class="mui-icon mui-icon-search"></span>
				<span class="mui-tab-label">搜索</span>
			</router-link>
		</nav>
  </div>
</template>

<script>
import {mapGetters} from 'vuex'

export default {
  name: 'app',
  data () {
    return {
      flag:false
    }
  },
  methods:{
    GoBack(){
      this.$router.go(-1);
    }
  },
  watch: {
    //页面刷新时不会触发watch
    '$route.path'(newVla){
      if(newVla==='/home'){
        this.flag=false
      }else{
        this.flag=true
      }
    }
  },
  computed:{
    ...mapGetters(["totalcount"])
  }
}
</script>

// overflow 设置超出屏幕部分隐藏
<style scoped>
  .app-container{
    padding-top: 40px;
    padding-bottom: 50px;
    overflow: hidden;
  }
  
  .v-enter{
    transform: translateX(100%);
  }
  .v-leave-to{
    transform: translateX(-100%);
    position: absolute;
  }

  .v-enter-active,.v-leave-active{
    transition: all 0.4s ease;
  }
  .mint-header{
    z-index: 99;
  }
  .mui-bar-tab .my-tab-item.mui-active {
  color: #007aff;
}

.mui-bar-tab .my-tab-item {
  display: table-cell;
  overflow: hidden;
  width: 1%;
  height: 50px;
  text-align: center;
  vertical-align: middle;
  white-space: nowrap;
  text-overflow: ellipsis;
  color: #929292;
}

.mui-bar-tab .my-tab-item .mui-icon {
  top: 3px;
  width: 24px;
  height: 24px;
  padding-top: 0;
  padding-bottom: 0;
}

.mui-bar-tab .my-tab-item .mui-icon ~ .mui-tab-label {
  font-size: 11px;
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
}
</style>
